Each title starts off with a ‘Fast Facts’ section, giving brief background information on the particular era. It also includes spies and their tools. The writing is serious. Mini biographies of spies and their actions are included. Anna Smith Strong, a spy during the Revolutionary War, cleverly used a clothesline to communicate with fellow spies, for example. These biographies give a personal touch to the stories. Illustrations include period photographs, posters, maps, charts, etc. One photo shows the Rosenbergs, found guilty and executed during the Cold War. A ‘Think About It’ add-on asks readers for questions to further consider the subject matter. VERDICT Perfect for reports and downtime reading, these titles should prove popular among students who like spies, especially during wartime.